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Oy Kwh Pipe Ab

USPTO Granted Patents = 15

CIPO Patents = 15

EPO Patents = 8

Trademarks = 3

Forward Citations = 151

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28 inventors (with patents filed for the assignee):

Gunnar Blomqvist (7 out of 9 patents)

Stefan Slotte (4 out of 4 patents)

Sven Sjöberg (3 out of 5 patents)

4. Charlotta Risku (2 out of 2 patents)

5. Jonas Holmlund (2 out of 2 patents)

6. Seppo Takala (2 out of 2 patents)

7. Anders Andtbacka (2 out of 2 patents)

8. Jouni Purmonen (1 out of 11 patents)

9. Leif Leiden (1 out of 13 patents)

10. Sven Sjoberg (1 out of 3 patents)

11. Patrick Jansson (1 out of 1 patent)

12. Christian Vestman (1 out of 1 patent)

13. Mikael Finne (1 out of 1 patent)

14. Leif Leidén (1 out of 1 patent)

15. Rauno Smått (1 out of 2 patents)

15 patents: Sort by Forward Citations

1. 9186838 - Apparatus and method for coating pipes or pipe sections (2015-11-17),

2. 8701714 - Multiple layer pipe (2014-04-22),

3. 8663767 - Hollow profile used in the manufacture of a pipe (2014-03-04),

4. 8568830 - Method for manufacturing coated pipes (2013-10-29),

5. 8474401 - Method and apparatus for coating pipes (2013-07-02),

6. 8062013 - Device for internal cooling of extruded thermoplastics pipes (2011-11-22),

7. 7770604 - Hollow profile used in the manufacture of a pipe (2010-08-10),

8. 7347910 - Method for manufacturing a container end wall of lightweight construction and a container provided with such an end wall (2008-03-25),

9. 6939424 - Method of making a spirally-wound tube (2005-09-06),

10. 6666945 - Preparation of an end of a thermoplastics tube manufactured by spirally winding a hollow profile (2003-12-23),

11. 6322653 - Method for joining spiral wound pipes (2001-11-27),

12. 5591292 - Welding method in the manufacture of a spirally wound tube and a welding (1997-01-07),

13. 5431762 - Method for joining spirally wound thermoplastic pipes together (1995-07-11),

14. 5411619 - Method for manufacturing a joint pipe (1995-05-02),

15. 5127442 - Plastic tube formed by spiral winding of hollow section (1992-07-07),

Oy Kwh Pipe Ab is a leading manufacturer of plastic pipes and fittings for water, sewage and gas applications. With over 70 years of experience, the company offers high-quality and innovative solutions for various industries. Kwh Pipe Ab is committed to sustainability and environmental responsibility in its manufacturing processes.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

15 Patents

#4 in Vaasa

#210 in Finland

#38,649 in the World

Oy Kwh Pipe Ab

Forward Citations = 151

28 inventors:

Gunnar Blomqvist (7 out of 9 patents)

Stefan Slotte (4 out of 4 patents)

Sven Sjöberg (3 out of 5 patents)

4. Charlotta Risku (2 out of 2 patents)

5. Jonas Holmlund (2 out of 2 patents)

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